Structure sensitivity of selective catalytic reduction of NO with propylene over Cu-doped Ti0.5Zr0.5O2-d catalysts
© 2014 Elsevier B.V. The structure sensitivity of selective catalytic reduction (SCR) of NO with propylene over Cu-doped Ti0.5Zr0.5O2-d catalysts was investigated systematically in a series of characterizations and in situ DRIFT spectroscopy. A Cu-doped Ti0.5Zr0.5O2-d catalyst with a hierarchical st...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Elsevier
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/24317 |
| _version_ | 1848751394348072960 |
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| author | Liu, J. Zhao, Q. Li, Xin Yong Chen, J. Zhang, D. |
| author_facet | Liu, J. Zhao, Q. Li, Xin Yong Chen, J. Zhang, D. |
| author_sort | Liu, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2014 Elsevier B.V. The structure sensitivity of selective catalytic reduction (SCR) of NO with propylene over Cu-doped Ti0.5Zr0.5O2-d catalysts was investigated systematically in a series of characterizations and in situ DRIFT spectroscopy. A Cu-doped Ti0.5Zr0.5O2-d catalyst with a hierarchical structure was fabricated successfully using a hydrothermal method (Hy-Sample), and shown to exhibit excellent SCR performance with high reaction rate and turnover frequency (TOF). The physico-chemical properties, mass transfer, and SCR activity of the catalyst depended on the preparation method. Another sample of Cu-doped Ti0.5Zr0.5O2-d catalyst prepared using a co-precipitation method (Co-Sample) exhibited a disordered, irregular morphology, whose SCR activity, as determined in a fixed bed reactor, was significantly lower than that of Hy-Sample. In comparison, Hy-Sample possessed an enhanced redox property, and its highly ordered morphology greatly promoted the generation of active sites, including the fine-dispersed CuO species and surface adsorbed oxygen. Consequently, NO and C3H6 were readily adsorbed and activated over Hy-Sample and induced the formation of important intermediates with high reactivity, such as isocyanate (-NCO) and cyanide (-CN) species. However, the activation capacity of Co-Sample toward reactants was very weak, and the sequential deficiency of N-containing organics could be the primary reason for the poor SCR activity of Co-Sample. |
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| format | Journal Article |
| id | curtin-20.500.11937-24317 |
| institution | Curtin University Malaysia |
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| last_indexed | 2025-11-14T07:52:02Z |
| publishDate | 2015 |
| publisher | Elsevier |
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| spelling | curtin-20.500.11937-243172017-09-13T15:07:51Z Structure sensitivity of selective catalytic reduction of NO with propylene over Cu-doped Ti0.5Zr0.5O2-d catalysts Liu, J. Zhao, Q. Li, Xin Yong Chen, J. Zhang, D. © 2014 Elsevier B.V. The structure sensitivity of selective catalytic reduction (SCR) of NO with propylene over Cu-doped Ti0.5Zr0.5O2-d catalysts was investigated systematically in a series of characterizations and in situ DRIFT spectroscopy. A Cu-doped Ti0.5Zr0.5O2-d catalyst with a hierarchical structure was fabricated successfully using a hydrothermal method (Hy-Sample), and shown to exhibit excellent SCR performance with high reaction rate and turnover frequency (TOF). The physico-chemical properties, mass transfer, and SCR activity of the catalyst depended on the preparation method. Another sample of Cu-doped Ti0.5Zr0.5O2-d catalyst prepared using a co-precipitation method (Co-Sample) exhibited a disordered, irregular morphology, whose SCR activity, as determined in a fixed bed reactor, was significantly lower than that of Hy-Sample. In comparison, Hy-Sample possessed an enhanced redox property, and its highly ordered morphology greatly promoted the generation of active sites, including the fine-dispersed CuO species and surface adsorbed oxygen. Consequently, NO and C3H6 were readily adsorbed and activated over Hy-Sample and induced the formation of important intermediates with high reactivity, such as isocyanate (-NCO) and cyanide (-CN) species. However, the activation capacity of Co-Sample toward reactants was very weak, and the sequential deficiency of N-containing organics could be the primary reason for the poor SCR activity of Co-Sample. 2015 Journal Article http://hdl.handle.net/20.500.11937/24317 10.1016/j.apcatb.2014.10.038 Elsevier restricted |
| spellingShingle | Liu, J. Zhao, Q. Li, Xin Yong Chen, J. Zhang, D. Structure sensitivity of selective catalytic reduction of NO with propylene over Cu-doped Ti0.5Zr0.5O2-d catalysts |
| title | Structure sensitivity of selective catalytic reduction of NO with propylene over Cu-doped Ti0.5Zr0.5O2-d catalysts |
| title_full | Structure sensitivity of selective catalytic reduction of NO with propylene over Cu-doped Ti0.5Zr0.5O2-d catalysts |
| title_fullStr | Structure sensitivity of selective catalytic reduction of NO with propylene over Cu-doped Ti0.5Zr0.5O2-d catalysts |
| title_full_unstemmed | Structure sensitivity of selective catalytic reduction of NO with propylene over Cu-doped Ti0.5Zr0.5O2-d catalysts |
| title_short | Structure sensitivity of selective catalytic reduction of NO with propylene over Cu-doped Ti0.5Zr0.5O2-d catalysts |
| title_sort | structure sensitivity of selective catalytic reduction of no with propylene over cu-doped ti0.5zr0.5o2-d catalysts |
| url | http://hdl.handle.net/20.500.11937/24317 |